Transmission-gearing.



H; 8.. R088. TRANSMISSION GEARING.

APPLICATION FILED SEPT. H5. I9l2.

' 1,226,012. Patented May15,1917;

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HARRY BEAUREGARD BOSS, OF DE rug scours-(:3 o-t to turn with UNITED STATES; PATENT OFFICE.

NVER, COLORADO, ASSIGNOR TO ROSS TRANSMISSION GEAR C0,, INCORPORATED, 0F DENVER, COLORADO.

TRANSMISSION -GEARING.

1 226111 2.. Specification of Lett r P en Patented May 15, 191 '2.

Application filed September 16, 1912. Serial No. 720,583.

To all whom it may concern Be it known that I, HARRY B. Ross, a citizen of the United States, residing at Den ver, in the count I of Denverhncl State of Colorado, have invented new and useful Improvcments in Transmission. Gearing, of which the following is a specification.

My invention is an improved variable. speed transmission. gearing embodying a set of concentric and eccentric internal gears on one shaft, to cooperate with a shittnble gear carried by the other shaft. with means for continuously keeping the shiituhlc gem in mesh with the concentric and. e :entric gears, the lottcr'hcing arrangml so limit when the shiftsblc gear is meshed with. the smaller concentric gear such gears wil ho locked to other to client the direct drive.

he invention its more specific nature includes thosc novel details cfconstructioii, combination and arrangement of parts, all of which will be first fully described and then be specifically pointed out in the uppencled claims, IEEQIGXRCQ/ being had to the accompanying drawing, in which-- Figure 1 is a, central longitudinal scction and part elevation of a two speed forward gearing with. the high or direct (lrivo posi tion of the parts inrlicateil.

Fig. Qis a View similar to Fig. 1. showing the position of the parts midwiiy between the high sncl low positions.

Fig. is c View similar to Figs. i end .3

showing the position of the parts c lia-.11 the is reached Fi fit is, adetuil sectional View" on the lino 5-5 of Fi 1.

In the drniirlng in which like numeruis ancl lettcrs of referenceindicute like parts in all of the figures, 1 is a. pm of the from lug which supports the transmission gearing and 2 is a slidewuy'which is sccurerl'to any suitable part of the framing 1,, Mounted to slidein the slidcway is a hearing carriage 3 which has a hearing portion Fl through which the shaft 6 projects, suitable ball bearings 5 being provided. to reduce friction'. Mounted. on one cnrl of the shuft (3 is the intcmul gear uicinhc 7. the sumo bethe shaft 6, and ti cu nicmhcr has 21 set of inn-rust goal faces 5, 1.0 and ll. the gear faces f mi l l1 hcii ci'mccutriiiully arranged While thc faces. The diameter of the turning of the gear face 10 is eccentric to the other gear gear face 10 is such that one tooth of the some will continuously aline with. one-tooth of the gear face 9 While the diametrically opposite tooth of the gear face 10 will alinc with the corresponding'tooth of the gear face 11, as best shown in Figs. 1 and 3 of the drawings. The gear men'iber 7 is provided with a "Web or shoulder 12 on its outer side at the plane of separation of the gear faces 9 and 10, and it is also provided with a similar shoulder 13 at the plane" of separation between the gear iucos 1.0 and. 11 to form abutme'uts up'iinst which. the retaining roller only cn; 3 to gr-rcvcnt the shiftiu of the gear from one position to another, save when the proper teeth are in a-lincment, as will be lntor morc clcarl runderstood.

The shaft 1 1, which in this instance is a driving shaft, carries a sleeve 1.5 which swivels on the shaftbctween the collars '16 and-Which has lateral lugs 1? to engage a li OI'l'ilOH of the fro-me. l, and. thereby prevent sleeve 15 with relation to the ironic The shulft it carries the gear 18- .iichis of :3. diameter corresponding to that of the gear face 9's'o that when it is in engagement w th the gear face 9 as indicated in Fig. 1. oil teeth of the gear 18 and tho gear .iitlfifil n1 he inmesh to e .1. direct connection hetwcen the shafts i un it he-- in z understood that the .18 is :c'yeol or otherwise secured to tic si t 14. 19 is on ill'll'l carried by the slows; to H around memhor 7 Ami this Min 19 has a porti in 9.0 which carries the spindle 21 on which the roller is mounted. The roller continuously engages the outerperiphery of the gear member 7 and main- In order to shift the shaft l-1- in the (lirccti-ou of its axis the shaft may be provideo. with collars 23 between which. the forked and 25 of a gear shifting lever 24 may project. The lever 24-. may coiiperatc with an arc segment 26 halvingnotches 27 and. 28 to cooperate with the latch 29 in holding the lever cithcr in its low or high" positions the case may be, it he 105 ion understood. that the. latch may be opcr- Tit-Gd iiith the usual rod 30 or uny'othcr (lo sii'erl mums um}: ho prz-vidml for shifting tho arm 19 null gcur tom-they in tho (lircction' of tho axes of tho slnii'tt; l 1 and. 5'3.

The shaft 6, which in this instance is a driven shaft, is provided with a universal joint 31 that connects the shaft 6 with the driven shaft section 32.

In operation assume the parts to be in the position shown in Fig. 1. It will be observed that the gear 18 is in mesh withthe concentric gear face .9 and as all teeth of such gears are in mesh no relative rotation will take place between the gear 18 and the gear member 7 but such gears will turn together-as one, thereby forming a direct con nection between the shafts 6 and 14 and applying the same number of revolutions to the shaft 6 as occur in the shaft-14.- This gives the direct drive. Now assume that it is desired to shift the gearing into position to impart a lesser number of revolutions to the shaft 6, than occur in the shaft 14, or in other words, supposing that it is desired to shift to the low position; the operator moves the lever 24, from the position. shown in Fig. 1, through the position shown in Fig. 2, to the position shown in Fig. 3. In passing from the position'shown in Fig. 1, the first movement of the lever 24 will beto the position shown in Fig.- E) which brings the gear 18 into mesh with the eccentric alines with gear 18.:

gear face 10. As the shaft 6 makes a half revolution, it is moved laterally through the medium of the slide 2 and carriage 3 to the position shown in Fig. 3 at which time the remaining movement'of the lever is effected to bring the gear large concentric gear- 11, thus giving the low speed drive. The roller 20, maintaining a constant relation to the gear 18, liolds that gear in mesh with any of the gear faces of the gear member 7 and by engaging the web or abutments '12 and 13 prevents the shifting. of the gear 18 until the proper time which occurs when the common gear tooth 33 between the gear sections 9- and 10, alines with the corresponding gear teeth of the gear 18 and w en thecommon gear tooth 3d between the gear faces 10 and 11 the ;..U( )1: 1:QSPOII11lIlg teeth of the In hifting from iiip sea- 3 back to the'high position of, Fig." 1,

' revefsdtmcration takes place'and the gear 1 8 is prevented from shifting at the wrong time by contact wlth the ad] acent inner surfaces of the :walls 13 and 12, as the case may be as will be clearly understood by reference to Fig. 3 'of the drawings- From the foregoing description taken in connection with the accompanying drawings, the complete construction, operation and advantages of the invention will be apparent to those skilled in the art.

What I claim is 1;. In a transmission gearing, a first and -a second shaft, a gear carried-by said first shaft, an internal gear member carried by and eccentric gear sur 18 into mesh with the.

"nati on of a said second shaft within which said ear operates,.said internal gear member aving a set of alternatel disposed concentric aces, means for shifting said gear into mesh with the respective internal gear surfaces, andmeansfor holdmg said gear in mesh with said gear surfaces, said last-named means comprising an arm mounted on said first shaft to shift said shiftable gear, and a connection between said arm and said internal gear member substantially as shown and described.

2. In a transmission gearing, a first and a second shaft, a car carried by said first shaft, an internal gear member carried by said second shaft within which said gear operates, said internal gear member having a set of alternately disposed concentric and eccentric gear surfaces, means for shifting said gear into mesh with the respective internal gear surfaces, and means for bolding said gear in mesh with said gear surfaces, said last-named means comprising an arm mounted n said first shaft to Shift said shifiablc gear, and a connection between said arm and said internal gear member, said set of concentric and eccentric gear surfaces including a concentric gear surface of the same diameter as that of said bination of a shaft and an internal gear member fast thereon and having a setlof internal gear faces a plurality of which are concentrically arranged. and another eccenti'i'cally disposed 'with relation thereto, said gear member having shoulders on its. outer side in different planes forming abutments, a second shaft, a gear carried thereby for coiiperai-ion with said internal gear, a movable member and a. roller carried thereby for continuous engagement with the outer periphcry of said gear member and coiiper'able .tl

i said abutments. I i

In vjariable speed gearing, the combidriving element, a d'ii'ven ele nicnt cmnprising change'speed, gears, an opcrating device for shifting the driving ele ment and for movin the change speed gears of the driven mem air to effect changes of speed of the driven member, said driven member having external 'abutm e'n'ts in different planes, and a roller movable'with the driving element and arranged for continuous engagement wit-h the outer periphery of the driven member and for cooperation with said abutments to prevent shifting of the driving element from one position to another.

5. In variable speed gearing the combination of a driving gear, a driven gear membe!- composed of gears of different diwith said abutments to prevent shifting of ameters, said gear member having exterior the driving gear. shoulders in different planes formlng abut-' ments, means for shifting the driving gear, "H BEAUREGARD ROSS 5 and means movable with the latter for con- Witnesses: tinuous engagement with the outer peri h- OLIVER E. BAR'IHEL,

ery of said gear member and eoiipera 1e ANNA M. Snnuren. 

